System or method of concrete fireproofing of structural steel.



F. P. KAFKA.

SYSTEM OR METHOD OF CONCRETE FIREPROOFING OF STRUCTURAL STEEL.

APPLICATION FILED MAY 25. I9I8.

1 306,700 Patented June 17, 1919.

5 SHEETS-SHEET I.

mam.

n-rromvers F. P. KAFKA.

SYSTEM OR METHOD OF CONfiRETE FIREPROOFING OF STRUCTURAL STEEL.

APPLICATION FILED MAY 25. 1918.

Patented J 11110 17 1919.

5 SHEETS-SHEET 2.

' 4 ATTORNEYS F. P. KAFKA. SYSTEM OR METHOD OF CONCRETE FIREPROOFING 0F STRUCIURM. STEEL.

' APPLICATION FILED MAY 25. 1918.

PatentedJ 11116 17, 1919.

s SHEETS-SHEET 3.

BY W MATTORNEYS I F. P. KAFKA.

SYSTEM OR METHOD OF CONCRETE FIREPROOFING OF STRUCTURAL STEEL.

APPLICATION FILED MAY 25. 191B.

1 ,306,700. Patentedjune 17, 1919.

5 SHEETSSHEET 4.

INVENTOR- F. P. KAFKA.

SYSTEM 08 METHOD OF CONCRETE FIREPROOFING OF STRUCTURAL STEEL.

APPLICATION FILED MAY 25. 1918.

1,306,700. Patented June 17, 1919.

5 SHEETS-SHEET 5.

Figi 7 r Ill/V NTUR MATTOR/VEYS' more:

sir

'rns ATEN FFICE.

ZFREEDEMCK 1P. KAFEKA, 0F NEWRQCHELLE, NEW YORK.

Specification of Letters iatent.

?atented J une 17, 1919.

Application'flled May 25, 191 s. Serial 0.286345.

T 0 all whom it may concern:

Be it known that I, FREDERICK I. KAFKA, a citizen. of the United States of America, and resident of New Rochelle, in the county of Westchester and State of New York, have invented certain new and useful Improvements in Systems or Methods of Concrete Fireproofing of Structural Steel, of which the following is a specification.

My invention relates to a method, or system of means, by which structural steel work is incased in concrete, reinforced or otherwise, for the purpose-of fire protection and such additional stability as may be derived from "the inherent characteristics of the means employed, and, particularly, relates to the method, or system of means, by which the horizontal girders and beams of fabricated structures are reinforced, strengthened and fireproofed, including means for supporting forms or molds between the girders and beams, so as to enable the production about and between the girders and beams of a homogeneous structure of great strength, durability and many other desirablecharacteristics; and also to a combination of means by which columns, pillars, and other verticals or-uprights are, or may be, combined with girders, beams. and simi lar supports in a ceiling or floor structure.

I am aware that concrete fireproofi-n'g and reinforced floor structures have beenmade by suspending box forms beneath the girders and beams, and by' supporting suitable forms between the girders and beams to accomplish all that I accomplish by the employment of the system and the apparatus hereinafter described. I therefore do not intend to claim broadly the system as a sys tem for accomplishing the result, but only in so far as I have improved the system by the apparatus employed by me in the various steps or st: es by which I build up the forms which accomplish the result.

Under the present system of concrete fireproofing and reinforced floor construction, it is the practice to construct boxes from planks of approximately an inch in thickness and suspend. these boxes below the beams. A temporary flooring is then con structcd between the beams and girders and usually supported by wire hangers embraccentage of :loss' in the lumber employed.

It has been found impractical to remove the forms intact and use them repeatedly in duplicate branches of the same-work. It

i has also beenfound that the lumber deteriorates so rapidly in the construction and wrecking of the forms that the same boards can only be used approximately three times, resulting in a higher percentage of cost.

My purpose in this invention is to standardize a system and method by which the work may be accomplished with greater expedition and economy than has been heretofore possible, and with the result that the work when completed will be more accurately disposed and of a better finish than is possible with the use of rough lumber in the manner previously described.

I have constructed frames which are adapted to be suspended from beam and girders and to carry between them not only the boards suitable for the girder form structure but also carry the temporary beams adapted to support the floor section formed between the beams and girders. I have discovered that a very thin fiber board can be used in carrying out my system in combination with my frames and that great efficiency and economy can be attained by the use of these fiber boards. In practice I out these boards of pre-determined dimensions. In the case of the beam forms I prepare sections which are long enough to span a pre-determined distance between. thev frames as suspended from the girders and other sections which are of a length suitable to span any intervening gaps between the girder sections. So with the floor sections, I prepare these sheets in sizes of predetermined dimensions suitable to overlie the supporting floor boards. and in practice I prefer to tack said boards by temporary here as l919.

Fig. 21 is a perspective view of a clip adapted to cooperate with the member illustrated in Fig. 18.

1 is a girder supported between two columns, one of said columns or pillars being designated as 3. These girders are usually of greater depth and weight than the beams, and it is customary in applying the concrete as hereinafter more fully dcsoribed'to leave the head or top section of the girders protruding out of the concrete as illustrated in Fig. 2. lVhen the fireproofing construction is completed it is usual to lay a second coat ing of ash concrete or other substance on top of the fireproofing concrete so as to cover the top of the girder and form a bedding for the finished flooring. 2 is one of a plurality of beams secured at right angles tothe girder last referred to. In such concrete construction it is required that the fireproofing concrete should embrace both the girder and beams and that such concrete should be homogeneous in such a way that it envelops both the beams and girders except as to the head or top section of the girder as heretofore stated. 4 indicates gen erally the whole construction that goes to. make. up theirame such as that illustrated in Figs. 2 to 5 inclusive.

Still referring to Fig. 1. 5 indicates the side walls of the form, while 8 indicates the base boards of the girder form. 9 are sill beams supporting the fioor supporting beams and 10 are the floor supporting beams. 11 are corner pieces adapted to receive the side walls of the forms. while 31 indicates a wire employed to support the framesz illustratcd in Fig. 4. 13 are floor boards adapted to rest on the cross beams 10. 1% are form boards embracing the column. 15 are forms employed in connection with building up the column form, 16* are angle pieces adapted to form the corners of the column forms.

Referring to Figs. 2 to 5 inclusive, and particularly to Fig. 4, 17 is a bifurcated member having a flat top pierced with two holes as 18--18 and two depending mem 1.) represents a series of holes in .these side members adapted to receive bolts. '20 is a spacing block and 21-21 are angle piecesprovided with bolt holes 22,

While 23 is a slot cut in one wing of the angle pieces 21, such out having one bevel surface as 24. 25 are bolts and 26 are winged nuts; the function of the latter being to hold the bifurcated member 17 and angle pieces 21 together, the spacing block 20 being interposed. In the structure shown in Fig. 5, 1 unite two of the forms shown in Fig. 14 and connect the same by a plate as 20, which operates to perform the function and take the place of the spacing block '20 as illustrated in Fig. 4. As previously stated, 8 represents the base board of the girder a separate board as as supported by the ends of the boards 8 form, while '5-5' represent the side walls. 29 is a bifurcated clip adapted :to hold together theside walls 5 of the form and one wing of the angle piece 21 when the same are assembled. 30-is a spacing block employed to space apart the base-board of the form and the base of the beam or girder. This block, as previously stated, is removed aifter the parts are assembled and adjusted and before the concrete is introduced. 3 31 is a-form supporting wire. It is adapted to pass through holes in the base-board of the form and corresponding holes 18 of the bifurcated member 17. It is shown at 32 below the said bifurcated member, and tied in a knot or loop at 33 on the top of the beam. 34 indicates the concrete as introduced into the form. 35 and 36 are tWo angle pieces, while 37 is a spacing block interposed be tween them. They are secured together by rivets or otherwise and form the corner pieces 11 into which the sidewalls 5 of the form ente and are supported. Thisstructure is illustrated in Figs. 1, 7 and 10.

Referring to Fig. 8, 38 is an angle piece adapted to fill in the gap between the elevation of the base of the form employed in connection with the girder and the form employed in connection with the beams. One wing of the said angle piece as 39 is secured by the wire as at 41 to the floor board of the beam as 8, and the other dependent membe extends below the base-board of y the girder as 8; and is pierced with holes through which is run the wire as 42 to secure said dependent members together against the edges of the base-board '8.

In the diagrammatic view in Fig. 11, the supporting forms are indicated as 4, while the floorboards of the form are indicated as 8". It is my practice to suspend one of said boards 8 between two of the forms 1 and to encompass the gap between them by 1 Referring to Fig. 12, the floor supporting -beams illustrated are formed by two channel pieces as 44; and 45, one being of slightly less depth than the ether, thus permitting 115 said members to telescope to any desired length whereupon they may be locked to gether by the clip as 16. This clip is illustrated in Fig. 13, where the original position of, the flanges or wings 46, are illustrated 120 in solid lines, while their position when clamped about the beams is illustrated in dotted lines as 46".. This combined structure 1 have designated as 10.

Referring to Figs. 14 and 15, the clip 125 therein illustrated comprises two bifurcated members as i8 and 49 adapted to fit over thh side wall of a form as 5. This clip is also provided with the extension 50 having the hole 51 therein. lnjFig. 15 is shown a 130 mortise as 9 in the sill beam 9 to receive the floor supporting beam 44. When in position the bifurcated members 48 and 49 embrace the vertical walls of the form as 5 and are secured to the beam 44 bya bolt Referring to Figs. 16 to 21 inclusive, is an angle piece formed with a right angular end as 16. Two of these are illustrated in 10 Fig. 18 as secured together by the clips 54:, the latter being shown open in Fig. 21. A column is designated in Fig. 16 as 3, and two of these forms such as illustrated in Fig. 18 are secured together by the Wires 55 as in- 1 dicated in F ig. 16. 16 are angle pieces cooperating with said forms 15, and H are wall members of the column form. 56 is a clip adapted to unite the wall members 1% and the angle pieces 16, while the clip illus- 20 trated in Fig. 19 is adapted to support and hold in alinement the wall members 14 of the column form as indicated. This latter clip has two oppositely disposed sets of parallel members, one set of three members being 2 designated as 58 and the other set of two members as 57. Referring now to Fig. 1, it will be seen that a pillar or column, the members of which are indicated by 3, is suitably juxtaposed to provide a hollow column having its ends closed by plate members The members of the column are held together by the frame member of Fig. 18, or its equivalent, in the manner shown in Fig. 16, the wires or binders 55, however.'

being omitted in Fig. 1. Such a column in a building structure, for example, is surrounded by the girders 1 and floor beams 2, as clearly shown, each having the form structures surrounding and applied to them,

40 as shownin Figs. 2 and 3, preparatory to having the plastic cement or concrete poured thercinto. The girders abut against opposite sides of the column, while the beams abut against the other opposite sides of the column, thus solidly combining the girders, beams and columns firmly together when the cement or concrete filling is solidified. As

shown in Fig. 1, the forms for the girders and beams, and the forms for the columns,

are so adjusted and juxtaposed as to cooperate with one another so that the concrete filling surrounding the girders and beams will become a homogeneous mass with the concrete filling surrounding the columns.

As previously stated, the object of this invention is to provide means by which forms may be so assembled as to provide a mold wherein may be cast a plastic substance such as concrete for the fireproofing and reinforc- 69 ing of girders and beams and the forming of reinforced concrete floors lying between the beams and girders. lVhile have shown in Fig. l a column and the form structure and auxiliaries therefor. the method, or sysas tem of means, by which the same is produced forms no part of my present invention, the same belng made the subject of a divisional application filed.

ll have characterized the invention as a system or method of accomplishing the re- 70 sults stated for the reason that the result is attained by the performance of certain steps or stages. It is necessary, of course, that I employ certain types of mechanisms in the accomplishment of the result. I will now de- 7 scribe these mechanisms and the steps or stages referred to.

The fundamental mechanism essential to the performance of the system other than the column forms is that structure which I characterize as a frame which is illustrated in perspective in Fig. 4. It is also shown in Figs. 2, 3 and 5. This structure comprises two members, a bifurcated element as .17

having holes 1818 in the top and holes 19 in the sides, and two angle iron members such as 2121 having holes in the side for the reception of bolts and a slot 23 in one of the flanges. I inter-pose between these elments the spacing blocks 20 or the spacing plate 20 In carrying out my system 1 cmploy a plurality of these frames which may be used alone as in Fig. 4: or in pairs as in Fig. 5. It will be noted that between the arms of the member 17 and the walls of the members 21 a space as 20 is provided. This space or way 'is intended to receive the ver tical side walls of the form. The relation benveen the members 17 and 21-21 may be adjusted by the bolts25 and thumb screws 26, so that the way 20 may be made shallow or deep as the occasion may require dependent upon the width of the board employed as a side board of the form or dependent upon the depth which it is desired that the form shall assume.

When I desire to construct a form beneath a girder 1 first take a base board as 8 perforated with holes corresponding to 18 and lay the same within the frame so that said holes register with the said holes 18 in the frame. I then run a wire 31 through these holes, the same appearing on the underside of the bifurcated member 17 as indicated at 32. I then interpose .a block 30 between the bottom flange of the girder 1 and the base board '8 and with the wire 31 I draw up the frame as far as the spacing block will permit and tie the wire on top of the beam as at 33. T can then remove the block 80 and the forms are then in position to be built up in the manner which I will now describe.

The walls 5-5 are introduced into the spaces 20" and held to the members 2l21 by the clips 29. As previously stated the bolts 25 cooperating with the holes 19 permit of an adjustment so that the side walls of the frame may be made of any desired height. The girder form referred to is now rye-eaves established between the baseboard 8 and the side walls 5.

Referring to Figs. 3 and 11, it will be noted that similar frames at are suspended 5 on the beam 2 at pie-determined intervals, preferably somewhat as indicated, and the intervening space between the floor-boards.

8 is filled by the connecting board 43. In

building up the side Walls I follow a simi- 10 lar procedure by placing the side-walls be.-

tween two of the frames in the slot and Where the side boards are not suificiently long I span the intervening space by a board not indicated in the drawing but whiclrcor- 15 responds with the board-43'Fig. 11.

I prefer to have the boards forming the base and side walls of. the form cut to uniform sizes, but it is obvious that the frame show-n in Fig. 4 is capable of adjustment 2e both vertically and horizontally to-meet'the conditions of any height or wldth of form. The horizontal adjustment can be accomplished by the thickness of the spacing block 20, the vertical adjustment, as previously stated, by the bolts and bolt holes'25 and 19.

In building. my construct-ion- I suspend these frames beneath the beams and girders and place the base and side boards in posir tion asindicated and these units may be so multiplied to any extent.

As previously stated, the girders are heavier and deeper than the beams, consequently when the forms are put in position there isa space intervening between the floor board of the beam forms and the base board of the girder forms. Fin-order to fill this space I provide the angle piece 38 having" one wing of the angle 39 tied to the-floor board 8 of the beam by the belts or wire as %l. The other wing 38 of the angle piece is dependent sufficiently to extend below the base board 8 of the girder form. The two ends of said. wings lO are bound together by the wire 42 thus closing the aperture to which would otherwise exist. between: the

girder and beam forms. I have illustrated the foregoing in Figs. 7, 8 and 9.

It is also necessary to provide means by which the side walls of the girder and beam 58 forms may be united in such a way as to be tied against leakage. This I accomplish'by the corner pieces 11 illustrated in Fig. 10."

These are formed of two angle members as 35 and 86, the spacing block as 37 interposed 555 between them, thus leaving a space 38* and 38 of a width approximately to receive-the side boards of theforms, said side boards being secured therein by suitable bifurcated clips or by any other means that may be apso propriate.

The foregoing: is all that is necessary to accomplish the building up of the forms suit able to incase the beams and'girders.

I will now describe the means for'b uild- 86 ing up a form forthe floor section-lyingcbetween the beams and girders. It will be understood that it is desirable that the floor section" concrete and the beam and girder concrete should be homogeneous when set. J

'Assuming that a rectangular structure is to be provided with a door and that the frames, as Fig; 4, are in place asindicated above, the next step is to place beam supporting sill-beams on either side of the rectangular structure as indicated in Fig. 1, or" these sill beams may be made to encompassthe entire rectangular form lying between the beams and girders. The sill beams refbrred 'toare indicated as 9-, and they are placed in the slot 23 of the frames, Fig. 4. Said-slot has an inclined lower surface as 24-which=h-asa tendency to hold said beams in position. I prefer that these beams should be mortised as indicated in 'Fig. 15, 9 to re- 8:; oei've the cross beams about to be described. The cross beams 10 shown in Fig. 1 audio -dicated in detail in Figs. 12' and 15 are formedof two-channel iron sections adapted to fit one within the-other, and to telescope to any desired length so as to fill the span between the adjacent sill beams 9. VVhen a proper-length-is attained-the clips illustrated in: Fig-.13 are bent over seas-toclasp and brace'two-sections of the beam, thus giving theri'gidity and strength necessary for the purpose of sustaining the weight of the door. The clip illustrated in Figs. 14 and listhen applied, the bifurcated-ends thereof embracing the side board ofthe form and the free end thereof 50 being secured to the cross beam 44' by the bolt 51. Boards as 1301113 to approximately appropriate sizes are then laid on the beams 10. They may be permitted tooverlap, and they, may be-se .105 cured to said beams 10 by any appropriate means, but it will be noted that said floor boards 13 overlap the side walls of the forms to a slight extent so asto makea complete union betw een the beam forms and the floor its forms.

When alt of these forms are in position as indicated concrete in plastic condition is poured into. the forms as indicated at 34: in Fig. It will be noted that they level M5 of the floor in that case is slightly below the top flange of the girder 1, whereas in Fig. 3 the dotted line 34 indicates the floor surface in that figure. lhis will also be-the floor surface of the floor between the-beams 20 and girders. However these levels can be varied to; suit any requirements.

When theconorete has set, the forms may be removed as follows. The wire 31 can be cutat the point- 32. This will release the 1% whole system of girder beam and. floor forms,- the wire: 31 remaining embedded in the concrete. It will then be possible to remove the cross beams 10, sill beams 9 and slip" out frame, 4:, thus releasing... the base board and side boards of the girder forms as well as the boards 13 of the floor beams.

My experience is that all of these elements can be removed without damage to any of the parts and that the same frames, beams and boards may be used over and over again for the same purpose.

I will now describe the assemblage of the pillar or column forms as illustrated in Figs. 16 to 21 inclusive. The structural column is usually of a form indicated in Fig. 16, having two channel pieces as 3 and two side walls cs3. T employ a plurality of members such as that indicated in Fig. 18 as a foundation for the form. These members may be joined together by a clip as 54 or they may be made in one piece with the two angle ends 16. I place two of these oppositely disposed members on either of the flat sides 3 of the column and secure the same together by appropriate means as the wires 55. A. plurality of these pairs inclose the column to the desired height as in dicated in Fig. 17. i then employ four corner pieces which are angle irons as 16 of suficient height to inclose the column and bind these angle irons 16? to the forms 15 by wires or any other suitable means. The form is now in position to receive the first layer of boards as 14-. Four of these are placed on the four sides of the square. i prefer to secure them to the angle irons by clips such as that illustrated in Fig. 20, where the bifurcation is caused to embrace the top of the board and the edge if the angle iron. The second tier of the form is built up as follows. The clips illustrated in Fig. 19 are placed with the lower bifurcations embracing the upper edge of the first tier of boards and the second tier of beards is placed between the arms of the upper bifurcations and secure-d to the angle irons 16 by the clips 56 as stated above.

in practice i prefer that these boards should be of uniform size suitable for the purpose but a large latitude in the sizes is possible as indicated by the overlapping of the boards in the illustration.

To disassemble this form first knock out the clips 56 and remove the boards. When they are all removed the angle irons are separated from the concrete. The member, as shown in Fig. 18, however, remains embedded in the concrete and is lost in each operation.

As previously stated I prefer in the practire of my system to employ a fiber board. This board is made very thin and has a remarkable degree of strength. It may be cut to any desired sizes suitable for the work or within the limitations of the adjustable capacity of the frames, but of courseit will be understood that l may use sheets of metal. A desirable feature however is that the sheets, whether of fiber or metal, should isoe xeo be cut of uniform sizes suitable for the purl pose indicated.

it is within the scope of my invention to adjust these forms on the ground and elevate! the same to a position adjacent the beams and girders, but I find that it is a more convenient practice to suspend the frames and build up the forms as indicated.

What I claim is:

l. in a system for concrete fireproof construction, a frame adapted to support a form to mold concrete about a beam or girder, a plurality of said frames being employed for the purpose, said frame having a platform to support the base board of the form and two slots one on each side of said platform and at right angles thereto, said slots adapted to receiveand support the side boards of the form at right angles to the base board of the form, and means to suspend said frame beneath the beam or girder.

2. in a system for concrete fireproof construction a frame adapted to support a form to mold concrete about a beam or girder, a plurality of said frames being employed for the purpose, said frame having a platform parallel with the baseof the beam to support the base board of the form and two vertical slots parallel with the axis of the beam adapted to receive and support the side walls of the form, with means interposed in said slots to fix the depth to which said side boards may enter the same, thus where the width of the side boards is constant determining the depth of the form, with means to suspend said frame beneath the beam.

3. in a system for concrete fireproof construction a frame adapted to support a form to mold concrete about a beam or girder, a plurality of said frames being employed for the purpose, said frame having a platform parallel with the base of the beam to support the base board of the form and two vertical slots parallel with the axis of the beam adapted to receive and support the side walls of the form, a slot on each side of said frame to receive and support a temporary sill beam which in turn operates to support one side of a floor section form, with means to suspend said frame beneath the beam.

4. in a system of concrete fireproof construction a frame adapted to support a form to mold concrete about a girder or beam as well as to form a floor section, a plurality of said frames being employed for the purpose, said frame comprising a bifurcated member with a central section parallel with the base of the beam and approximately of the width of the beam form, with two legs one dependent from each end of said central section, said legs pierced with bolt holes, two angle irons of right angular cross section, one wing thereofof each provided with bolt holes corresponding withthose in said legs and the other wing provided with a slot adapted to receive asill beam to support one side of the floor section form, a spacing block interposed between said an gle irons and said legs with bolts and nuts to secure thelegs and angle irons. together and to adjust their relative position, with means to suspend said frame beneath the beam.

5. In a system for concrete fireproof construction a frame adapted to support forms to mol'd concrete to envelopthe beams and girders and toform a reinforced floor section intermediate saidbeams and. girders, a plurality of said frames being employed in. practising the system, said frames com prising a platform parallel with: the base of the beam adapted to support the baseboard of the-beam form, and? two vertical slots parallel; with the axis. of the beam adapted toreceilve and: support the side=wall of the beam. form", slotsone either side-of the forms to reserve and support temporary frame supporting sill beams: with. means to suspend? the forms beneath the beams and irders, in: a right angular section: formed 'etween two girders and two beams, four temporary beams thus supported: and-temporary base plates of the floor section laid thereon.

6; In a system 'for concrete fireproof construction, a frame adapted toasupport forms to mold concrete toenvelop the beams and girders and to. form. a reinforced floor section' intermediate said beams and girders, a

plurality of said frames being employed inpractising the system, said frames comprising a platform adapted to support the base boardof the beam form, and having twoinner slots adapted to receive and suportside boards of the beam form, and also having outer slots on either side of the forms to receive and support temporary sill beams; means to suspend the forms beneath the beams and girders; temporary Slll beams supported in said outer slots; temporary cross-beams supported thereby; boards of uniform length and Width laid as floor boards uponthe cross-beams between said forms with sections of board of like width but not so long spanningthe gaps intervening; side boards supported in said inner slotsand corresponding in lengthto the floor boards; base-boards supporteduponsaid frame-platform; and means for making a union between= adyaoent ends ofthe several boards to retain the concrete when so placed in the form in a plastic state, all being removable-when the concrete is set, except the frame supporting.- meanswhlchremains embedded in the-concrete.

7. A- formmember for employnnent in systemof meansfor'produei-ng commetecoin struction, the same comprisinga bifurcated member, the arms of whichare each provided with: a series of apertures; and anglemembers secured, to said arms in spaced apart relation thereto; each angle-member being provided With-a slot adapted to receive asill beam.

8, In a system for concrete fireproof construction a frame adapted to support a form to mold. concrete about a beam or girder, a plurality of said frames being employed for the purpose, said frame hauing a platform parallel with the base of the beam. to support the base board of the form and: two vertical slots parallel with the axis of the beam adapted to receive and support the side walls of. the form, with means to suspend said frame beneath the beam, sheets of fiber board of pro-determined dimensions adapted; to fit into said frame to produce a form substantially as described.

9; In a system for concrete fireproof'construction a frame adapted to supper-ta form to mold concrete about a beam or girder, a plurality of said frames being employed for the purpose, said frame having a platform parallel with; the base of the beam to support the base-board of the form and two vertical slots parallel with the axisof the beam adapted to receive and support the side walls of'the form, with means interposed in said slots to fix the depth to which said side boards may enter the same, thus where the width of the side boards is constant determiningthe depth of the; form, with means "to suspend! said frame-beneath the beam, sheets of fiber board. of pre-determined dimensions adapted to fit into said frame to: produce a form substantially as described.

10. Ina system for concrete fireproof construction a frame adapted to support forms to mold concrete to envelop the beams and girders and to form a reinforced floor section intermediate said beams and girders, a plurality of, said frames being employed in practising the system, said frames comprising a platform parallel with the base of the beam adapted! to support the base board of the beamaform-,and two vertical slots parallel withitheaxis ofthe'beamadapted to re-.

ceiwe andsupport the side wall of the beam form, slots on either sidebf the forms to said in said r o g the same at predcte aoart said frames c rmprising a pietailel With the base of the beam the beam an and having two -vertical. siots naraliei with the axis of the beam adafpted to receive and support the side wall of th beam form, slots on either side of the forms o receive and suoport temporary frame g siil beams with means to suspend s beneath the beams and ,g'irdeis at 1 1 f I s as stated, in Lied between two girders tour temporary siil beams "ted Within said slots vs a-i'id temporary door section su; )orted ids on said nredete i on, C)

me u. w a mu :Jiiriliiti MUG Judie-.5; CL 1K) ,L J3 w 4." mensions atta ned iciin s floor secfoor section of saic.

tron rms and for bei

exec

lemai I on-"n member tor employment in a system e means for producing concrete conem of means for producing conc tion comprising a bii'ureated member, of which is flattened h an a i .18 provided en a $1111; -members adjustab secured to toe said srms in spaced apart relation. thereto, said angle-members projecting in parallel reiation a considerable distance beyond the flattened base of the bifurcated member; wall boards set in said slots between the biiurcated member and angle-members; means for securing the Wall boards to the anglemembers and means whereby the entire structure may be secured to a beam or girder.

l i. A system of means for producing concrete construction comprising a bifurcated member, the base of Which is flattened and gar vided with an aperture, and the arms of which are provided with plurality of apertures; angiemembers-adjustably secured to the said arms in spaced apart relation thereto, said anglecnembers projecting in paraiiel reiaticn a considerable distance beyond the flattened base of the bifurcated membe Wail boards set in said slots between the bifurcated member and angiemembers; means for securing the Wall boards to the angie-members; base boards set upon the flattened base of the bifurcated member be tween the Wall boards; and means whereby the entire structure may be secured to a beam or girder 15. A system of means for producing'cou crcte construction compsising urcated member, the base 015 Which is flattened and provided with an. aperture, and the arms of .or girder,

it). A system of means for producing reinforced concrete construction embodying a pluraiity of girders and beams arrangedai right-angles to each other; form frames mounted on the girders and beams; Wall and base boards mounted upon the form frames; angle-pieces connecting the Wali boards at the angle of the girders and beams; and angle-pieces connecting the base boards at the point of juncture of the girders and beams.

17. In a system of means for producing concrete construction, and in combination With a girder and a plurality of beams abutting against the girder at a right-angle to the latter; a plurality of form frames mounted upon the beams and upon the girder; Wall boards mounted upon the several form frames; and bifurcated angle-pieces into which the form boards of the girders and beams extend whereby to form a closing juncture between the form boards of the girders and beams at the angles where the cams abut the girder.

18. In a system of means for producing concrete construction, and in combination with a girder and a lurality of beams abuttin against the girder at a right-angle to the atter; a plurality of form frames mounted upon the girder and beams; base boards mounted upon the form frames beneath the girder and beams; and anglepieces forming a juncture between the base boards, which are arranged at an angle to each other substantially at the points of abutment of the beams against the girder.

19. In a system of means for producing concrete construction, a plurality of forms adapted to be suspended from girders and beams; wall boards mounted in said frames; sill beams also mounted in said frames parallel to the'wall boards, said sill beams eing mortised; floor board supporting beams supported upon the sill beams in the mortise thereof; and connecting means between the fioor board supporting beams and wall boards.

20. In a system of means for producing concrete construction, a vertical column or pillar; form frames secured to said column in spaced apart relation; frame boards mounted upon the form frames so as to entirely inclose the column; in combination with girders abutting opposite sides of the column; and beams abutting opposite sides of the column at a right-angle to-the girders; form frames mounted, respectively, upon the girders and beams; base boards mounted upon the form frames beneath the 'rders and beams; and wall boards mounte upon the form frames at opposite sides of the girders and beams and embracing the base boards.

21. In a system of means for producing concrete construction; a vertical column or pillar; form frames secured to said column 1n spaced apart relation; frame boards mounted upon the form frames so as to entirely inclose the column; in combination with girders abutting opposite sides of the column; and beams abutting opposite sides of the column at a right-angle to the girders; form frames mounted, respectively, upon the girders and beams; base boards mounted upon the form frames beneath the girders and beams; wall boards mounted upon the form frames at opposite sides of the girders and beams and embracing the base boards; sill beams mounted upon the form frames; floor board supporting beams mounted upon the sill beams; and floor boards mounted upon the supporting beams and arranged to overlap the wall boards of the girders and beams, whereby a lastic material supporting form is built agout columns and girders and beams into which the plastic material may be poured.

Signed by me at New York city, N. Y., this 23rd day of May, 1918.

FREDERICK P. KAI".

Witnesses HARRY KRAUSS, MARGARET VOGEL. 

